Chevrolet 2002 Impala, Owner'S Manual

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Torque Lock
If you are parking on a hill and you don’t shift your
transaxle into PARK (P) properly, the weight of the
vehicle may put too much force on the parking pawl in
the transaxle. You may find it difficult to pull the shift
lever out of PARK (P). This is called “torque lock.” To
prevent torque lock, set the parking brake and then shift
into PARK (P) properly before you leave the driver’s
seat. To find out how, see “Shifting Into PARK (P)” in
the Index.
When you are ready to drive, move the shift lever out of
PARK (P) before you release the parking brake.
If torque lock does occur, you may need to have another
vehicle push yours a little uphill to take some of the
pressure from the parking pawl in the transaxle, so you
can pull the shift lever out of PARK (P).
Shifting Out of PARK (P)
Your vehicle has an automatic transaxle shift lock
control system. You must fully apply your regular
brakes before you can shift from PARK (P) when the
ignition is in ON. See “Automatic Transaxle Operation”
in the Index.
If you cannot shift out of PARK (P), ease pressure on
the shift lever by pushing it all the way into PARK (P)
while keeping the brake pedal pushed down. Release the
shift lever button if you have a console shift. Then move
the shift lever out of PARK (P), being sure to press the
shift lever button if you have a console shift.
If you ever hold the brake pedal down but still can’t
shift out of PARK (P), try this:
1. Turn the ignition key to ACC.
2. Apply and hold the brake pedal down until the
end of Step 4.
3. Shift to NEUTRAL (N).
4. Start the engine and shift to the drive gear you want.
5. Have the vehicle fixed as soon as you can.